组合仪表罩垂直内嵌复合倒扣四次侧抽机构及注塑模具设计  

Designs of Injection Mold and Four-time Side Core-pulling Mechanism for Combined Instrument Cover with Vertically Embedded Composite Undercuts

作　　者：李厚佳[1] 简发萍[1] 郑得庆 陈小红[3] LI Houjia;JIAN Faping;ZHENG Deqing;CHEN Xiaohong(Advanced Technical Vocational Institute,Shanghai University of Engineering Science,Shanghai 200437,China;Shanghai Yunsheng Precision Molding Co.,Ltd.,Shanghai 201613,China;School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海工程技术大学高等职业技术学院,上海200437 [2]上海云升精密模塑有限公司,上海201613 [3]上海理工大学材料与化学学院,上海200093

出　　处：《塑料工业》2024年第12期76-82,109,共8页China Plastics Industry

基　　金：国家自然科学基金资助项目(51201107);上海工程技术大学重点扶持项目(GZ23-2)。

摘　　要：针对类O型壳状复杂塑件同一侧面3个倒扣内各嵌含2个抽芯方向与其呈90°的垂直复合倒扣、内侧4个斜倒钩、侧面2个深度长达35.5615 mm的倒扣、四周侧6个倒扣的结构难点,解决同一侧面垂直内嵌复合倒扣如何实现多次侧向抽芯的问题,同时研究斜倒钩同步抽芯、长距离抽芯及热流道转冷流道复合浇注系统设计。创新提出了斜面型芯+L块式复合侧抽芯方法,一次开模成功实现侧面垂直内嵌复合倒扣的4次侧向抽芯。设计了斜顶同步抽芯机构,成功实现内侧4个斜倒钩与内侧倒扣的同步抽芯,利用油缸成功实现2个深长倒扣的侧向抽芯,利用斜导柱侧向抽芯机构实现四周侧6个倒扣抽芯。设计了4类抽芯机构,一次开模实现复杂倒扣产品脱模,设计了热唧咀转冷流道4点潜伏式浇口的复合浇注系统,满足生产要求。该模具已投入批量生产,结构合理、动作可靠,能够满足生产需求,为同一侧面垂直内嵌复合倒扣的多次侧向抽芯设计提供了新思路,在注塑模具设计领域具有较好借鉴意义。O-like shell complex plastic parts have three vertical composite undercuts on the same side,each of them contains two undercuts whose pulling direction is 90°,four oblique barbs are on the back,two undercuts which are deep up to 35.5615 mm are on the side,and six undercuts are on four sides.In view of these structural difficulties in the mold design,this paper aimed to solve the problem of how to realize multiple side core-pulling on the same side with vertical embedded composite undercuts,and the design of simultaneously core-pulling for oblique barbs,long distance core-pulling and compound gating system with hot sprue and cold runners were researched.The composite core-pulling method by inclined core+L-block was innovatively put forward to successfully realize four-time side core-pulling for vertical embedded composite undercuts with only one-time die opening.Then angle lifter synchronous core-pulling mechanism was successfully designed to realize the simultaneously core-pulling for four oblique barbs and inner undercuts.The side core-pulling for two long undercuts was successfully achieved by using cylinders,the core-pulling of six undercuts on four sides was successfully achieved by inclined guide pin core-pulling mechanism.With the design of four kinds of core-pulling mechanism,the demoulding of product with complex undercuts was realized by one-time die opening.The compound gating system with hot sprue and cold runner with four-point subsurface gate was designed to meet the production requirements.The mold has been put into mass production with reasonable structures and reliable actions,which could meet the production demands.This paper provided a new idea for the design of multiple side core-pulling on the same side with vertical embedded composite undercuts,showing a good reference significance in the field of injection mold design.

关 键 词：垂直内嵌复合倒扣 斜面型芯+L块式复合抽芯机构 侧向4次抽芯 热唧咀转冷流道复合浇注系统 注塑模具 

分 类 号：TQ320.66+2[化学工程—合成树脂塑料工业]